Sewing-machine



(ModeL) 2 Sheets-Sheet 1.

E. T. THOMAS.

Sewing Machine.

Patented Aug. 3, 1880.

(ModeL) 2 Sheds-Sheet 2.

E. T. THOMAS. Sewing Machine. f

No. 230,677. Patented Aug. 3,1880.

"MPHERS, FHOTOLJTHDGRAPHER, WASHINGTON, D. C

UNITED STA-TES- PATENT OFFicr-t.

EDDYT. THOMAS, OF NEW YORK, N. .Y., ASSIGNOR TO THE GOLD MEDAL SEWING MACHINE COMPANY, OF ORANGE, MASSACHUSETTS.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 230,677, dated August 3, 1880.

Application filed March 1, 1880. (ModeL) To all whom it may concern:

Be it known that I, EDDY T. THOMAS, of.

the city, county, and State of New York, have invented an lmprovementin Sewing-Machi nes, of which the following description in connection with the accompanying drawings, is a specification.

This invention relates to improvements in sewing-machines employing a rotary recipro- IO eating or oscillating shuttle, it oscillating substantially about itsown center in a horizontal plane.

One part of this invention consists in an oscillating shuttle-carrier having a spirally I5 twisted or grooved shaft combined with a vibratable lever and connected link, and a rotatable nee(.lle-bar-actuating shaft to operate the said link and lever and oscillate the shut tle carrier. My invention also relates to means for operating the four-motioned feeding device, as will be hereinafter more fully described.

Figure 1 represents an under-side view of a sewing-machine provided with my improve- 2 5 ments; Fig. 2, a side elevation of a sufficient portion thereof to illustrate my present invention. Fig. 3 is a detail of the arm to actuate the lever that moves the feeding device forward, and Fig. 4 a detail showing the shuto tle-carrier and shuttle-race as they. will be made in practice.

The bed-plate a, standard I), overhanging arm 0, and main driven shaft dare and may be of usual construction-as, for instance, in the 3 5 Domestic orin Home shuttle sewing-machines. The said shaft dis employed to operate the needle-bar and needle, all as usual.

The shuttle-carrier e'(shown as located within an annular shuttle-race 0r receiving-cham- 0 her, 9, and provided with a shuttle-engaging horn, f,) will be connected with the upper end of the twisted or spirally-grooved shaft h, substantially as in United States Patent No. 188,515.

The lever j, pivoted at it upon an ear or lug, t, at the under side of the bed-plate a, has its forward end forked, as at 2, to embrace this twisted shaft h, and cause it and the shuttlecarrier to oscillate as the leverj is vibrated upon its horizontal pivot is by the action upon it of p the connecting-rod l, shaped at its upper end to surround an eccentric, m, on the main shaft to, and connected by a short link, a, with the rear end of the said lever j.

The needle-actuating mechanism and takeup, (not herein shown,) as well as the shuttle itself, may be of any usual construction.

The four-motioned feed-bar 19, (shown in Fig. 1,) of any usual shape, supported at one end upon the stud 3, has at its lower edge two notches, 4 5, the former to receive the end of the feed-lifting rod 0", pivoted to move about the horizontal pivot 6. The rear endof this lever. r is extended loosely through a hole made for it in the link 8, pivoted upon the co 6 centric-strap t, which surrounds an eccentric on the shaft (1.

The lever w, for moving the feed-bar forward, has its pivot at 7, on the usual movable fulcrum-slide m. This lever has at its rear end a pin, 8, .(see Fig. 1,) that enters the slot 9 in the arm 10, secured to the vibratable lever j at 12.

Shaft h is supported at its lower end by step 18. This one leverj, it will be seen, is made to oscillate both the shuttle and to move the feed-bar forward. The feed-bar is thrown down and back by the spring 14.

I am aware that it is not new to move the feed-bar by means of rods and levers connected with a vibrating shuttle-actuating lever.

I have aimed to produce a rapidly-running, easily-operated machine, simple in construction and economical to build, and by the devices described it is possible to oscillate the shuttle at high speed without the employment of toothed gearing.

I do not broadly claim an oscillating shuttle-carrier at the upper end of an oscillating shaft, nor do I broadly claim a spirally-twisted shaft and a lever to move it, as I am well aware that substantially such devices have been long used in the well-known Grover & Baker machine.

I am also aware that it is customary to os- 1; cillate the spirally-twisted shaft of a shuttledriver by means of a long elbow-lever having its pivot at the rear of the machine, the upper upon the horizontal pivot 7c, and the arm 10, carried by the said lever, combined with the lever 20, connected with and moved by the said arm, the lever r, its link s, and the feed-bar, the lever 10 moving the feed'bar forward and the lever r lifting it at the proper times, as shown and described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EDDY T. THOMAS.

Witnesses:

SPENCER O. DOTY, ALLEN P. GRE UE. 

